
• A receptacle of air in various parts of the system; as, a cell or minute cavity in the walls of the air tubes of the lungs; the air sac of birds; a dilatation of the air vessels in insects. • A cavity in the cellular tissue of plants, containing air only.
Found on
http://thinkexist.com/dictionary/meaning/air_cell/

any of various tiny chambers in the body that are filled with air, such as an alveolus of the lung. a cavity within the body that contains air, such as within one of the bones of the head; see ethmoidal air cells, mastoid air cells, and tubal air cells.
Found on
http://www.encyclo.co.uk/local/21001
Air' cell` 1. (Botany) A cavity in the cellular tissue of plants, containing air only.
2. (Anat.) A receptacle of air in various parts of the system; as, a cell or minute cavity in the walls of the air tubes of the lungs; the air sac of birds; a dilatation of the air vessels in insects.
Found on
http://www.encyclo.co.uk/webster/A/47

the air space between the two shell membranes, usually at the large end of the egg
Found on
https://www.encyclo.co.uk/local/22440

a cavity or receptacle containing air. · a cell in which the positive electrode is depolarized by the oxygen in the air.
Found on
https://www.infoplease.com/dictionary/air-cell
No exact match found.